Semidol is designed to correct low pH levels in acidic water. It is a media produced from naturally occurring dolomite, which is comprised of calcium magnesium carbonate oxide. Semidol is used to correct pH levels in drinking water, for industrial processes and in swimming pools. Semidol can also be used to aid in iron and manganese removal from water.

Semidol is a fast reacting pH corrector, making it particularly effective when used to treat very low pH levels in water. It also reacts neutrally, which means it does not interfere with other medias and causes no problems during the switch over process.